FROM alpine:3.7-tz.8

# A few problems with compiling Java from source:
#  1. Oracle.  Licensing prevents us from redistributing the official JDK.
#  2. Compiling OpenJDK also requires the JDK to be installed, and it gets
#       really hairy.

# Default to UTF-8 file.encoding
ENV LANG zh_CN.UTF-8

# add a simple script that can auto-detect the appropriate JAVA_HOME value
# based on whether the JDK or only the JRE is installed
RUN { \
		echo '#!/bin/sh'; \
		echo 'set -e'; \
		echo; \
		echo 'dirname "$(dirname "$(readlink -f "$(which javac || which java)")")"'; \
	} > /usr/local/bin/docker-java-home \
	&& chmod +x /usr/local/bin/docker-java-home
ENV JAVA_HOME /usr/lib/jvm/java-1.8-openjdk
ENV PATH $PATH:/usr/lib/jvm/java-1.8-openjdk/jre/bin:/usr/lib/jvm/java-1.8-openjdk/bin

ENV JAVA_VERSION 8u222
ENV JAVA_ALPINE_VERSION 8.222.10-r0

RUN set -x \
	&& apk add --no-cache \
		openjdk8="$JAVA_ALPINE_VERSION" \
	&& [ "$JAVA_HOME" = "$(docker-java-home)" ]

# docker build --rm -t openjdk8-alpine:tz8 .
# docker rm -f test
# docker run -d -ti --name test openjdk8-alpine:tz8
# docker exec -ti test /bin/bash